Depression can be many things, feeling down, unable to enjoy activities you normally enjoy, and little motivation for almost anything. You might even feel disconnected from yourself almost like you're a different person and you can't be yourself because of your mood.
"Luna (@luna.catlove on snap) you DEFINITELY have depression! Is your therapist helping you? I hope you're okay. I'm always here for you my love. See you soon... unless you're too depressed to get out of bed"